PHP is an open source scripting language that is designed to produce
dynamic web pages. PHP can be simple to use for a newcomer, but it also
offers many advanced features for professional php programmers and
developers. PHP can be used on all major operating systems, including
Linux, many Unix variants (including HP-UX, Solaris and OpenBSD),
Microsoft Windows, Mac OS X and others. It is supported by most web
servers as well, including Apache and Microsoft Internet Information
Server.